US2070668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave transmission network
Assignee: AT&T Inc
•
Filing: 1935-10-04
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Granted: 1937-02-16
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Expires: 1955-10-04
Abstract
No abstract record available.
Inventors
- 👤 Walter R Lundry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:19
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/14; H04B3/143; H04B3/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-02-16 | 1940-08-17 | 1941-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-02-16 | 1944-08-17 | 1945-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-02-16 | 1948-08-17 | 1949-02-16 | $7700.00 | Window Closed / Lapsed |